- O
-
- object
- (1) A computer representation of something that a user
can work with to perform a task. An object can appear as
text or an icon. (2) A collection of data and member
functions that operate on that data, which together
represent a logical entity in the system. In
object-oriented programming, objects are grouped into
classes that share common data definitions and member
functions. Each object in the class is said to be an
instance of the class.
- object code
- Machine-executable instructions, usually generated by a
compiler from source code written in a higher-level
language (such as the C++ language). For programs that
must be linked, object code consists of relocatable
machine code.
- object file
- (1) A file that contains compiled code. (2) A member file
in an object library. IBM. Object files end
with the file extension .obj (OS/2, Windows) or .o (AIX).
Contrast with source file.
- object library
- A file used to store object modules.
- object module
- (1) All or part of an object program sufficiently
complete for linking. Assemblers and compilers usually
produce object modules. T. (2) A set of
instructions in machine language produced by a compiler
from a source program. IBM.
- object-oriented programming
- A programming approach based on the concepts of data
abstraction and inheritance. Unlike procedural
programming techniques, object-oriented programming
concentrates on what data objects comprise the problem
and how they are manipulated, not on how something is
accomplished.
- octal
- A numbering system that uses eight digits, 0 through 7.
It is used as a shorthand system for representing binary
characters that use six bits.
- open file
- A file that is currently associated with a file
descriptor. X/Open, I.
- operand
- An entity on which an operation is performed. I, A.
- operation class
- A class that defines all elements and key operations
required by a specific collection implementation.
- operator
- A symbol (such as +, -, *) that represents an operation
(in this case, addition, subtraction, multiplication).
- operator function
- An overloaded operator that is either a member of a class
or that takes at least one argument that is a class type
or a reference to a class type. See overloading.
- operator precedence
- In programming languages, an order relation defining the
sequence of the application of operators within an
expression. I.
- optical reflective disc
- An optical videodisc that is read by means of the
reflection of a laser beam from the shiny surface on the
disc.
- ordered collection
- (1) An abstract class that has the property of ordered
elements. (2) In general, any collection that has its
elements arranged so that there is always a first
element, last element, next element, and previous
element. Contrast with unordered collection.
- ordering relation
- A property that determines how the elements are sorted.
Ascending order is an example of an ordering relation.
- overflow
- A condition that occurs when a portion of the result of
an operation exceeds the capacity of the intended unit of
storage.
- overflow condition
- A condition that occurs when a portion of the result of
an operation exceeds the capacity of the intended unit of
storage.
- overloading
- An object-oriented programming technique where one or
more function declarations are specified for a single
name in the same scope.
- owner window
- A window similar to a parent window, but it does not
affect the behavior or appearance of the window. The
owner coordinates the activity of a window. See parent window.
-
